<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/keyframes-test.js"></script>
<script>
test(function() {
  assertAnimationStyles([
    {opacity: '0.5', left: '50px'},
    {opacity: '0', left: '0px', offset: null},
    {opacity: '0.75', left: '75px', offset: null},
  ], {
    0: {opacity: '0.5', left: '50px'},
    0.25: {opacity: '0.25', left: '25px'},
    0.5: {opacity: '0', left: '0px'},
    0.75: {opacity: '0.375', left: '37.5px'},
    1: {opacity: '0.75', left: '75px'},
  }, 'case A');

  assertAnimationStyles([
    {opacity: '0.5', left: '50px', offset: null},
    {opacity: '0', left: '0px', offset: 0.25},
    {opacity: '0.75', left: '75px', offset: null},
  ], {
    0: {opacity: '0.5', left: '50px'},
    0.125: {opacity: '0.25', left: '25px'},
    0.25: {opacity: '0', left: '0px'},
    0.5: {opacity: '0.25', left: '25px'},
    0.75: {opacity: '0.5', left: '50px'},
    1: {opacity: '0.75', left: '75px'},
  }, 'case B');
},
'element.animate() with null offsets specified',
{
  help: 'http://dev.w3.org/fxtf/web-animations/#the-keyframe-dictionary',
  assert: [
    'element.animate() should start an animation when keyframes are specified with',
    'null offsets. The behaviour should be identical to not specifying the offsets.',
  ],
  author: 'Alan Cutter',
});
</script>
